Activating the dual dac mode is currently unavailable on the iOS app. An update is on the way soon, I hope.

Interesting. Unit variance/margin for error with the sennheiser cables then. My IE900 spins like a Booker T with the stock cables.

I've just gotten IE900 for myself and had the same issue on the left side. I determined that it was an issue with the 3.5mm cable because the 4.4mm worked fine. After reaching out to Sennheiser support, I decided that getting a new cable was probably inevitable anyway. They required me to send...

Thanks for the response. There is also an error in the 'filter' menu with the spelling of 'hybrid'.

Same here! Anyone? I don't see the dual-dac option in my control app. I'm also an iOS user.

I restart the device.

Yup. I've had this issue too. Seems like a buggy OS

Yup. Same here. But I'm not fussed about it. I only charge my device when it gets to about 20% or less. Fingers crossed that the Hiby OS (skinned android) has some battery management built-in. Otherwise I hope they can replace batteries as a service.

Possibly: Linear Phase Fast Roll-Off Linear Phase Slow Roll-Off Minimum Phase Fast Roll-Off Minimum Phase Slow Roll-Off

Sounds like something I went through. A restart worked for me. Although I haven't added new music since I last had the issue. Once I get a new album I might try again. But I think I'll be using the wifi upload feature.

So my ER4XR has come apart. While trying to remove the cable from the right housing, collar around the housing has come off and with it the socket, exposing the internal cabling and I could pull the driver out halfway. Got in touch with Amazon customer support as my unit is only 11 months old...

Thanks. A restart of the device sorted the issue. I'll see what happens when I next add music (really rare these days with all the streaming services available.) Still hoping that Hiby will enable European characters. This will be great for me as much of my library is classical music and having...

Yes these were files from an external. I restarted the device and it fixed it. Probably an SD mounting issue? The new tracks that I loaded were indexed in the app but none of them played, including the previously loaded tracks. Tracks included MP3, ALAC, FLAC.

Just found another issue - after scanning music in the Hiby app, all the albums and artists are populated; however, when I try to play anything in the app, it comes up with 'File Not Found'.